Rocklands Reservoir

Updated as of 9:00 AM 02 July 2025

Rocklands Reservoir is the largest reservoir within GWMWater’s water supply system and is located on the Glenelg River. Originally constructed to supply the Wimmera-Mallee Domestic and Stock channel system, water held by Rocklands Reservoir is now used for many different purposes. A unique feature of Rocklands Reservoir is that all entitlement holders, including the environment, are able to be supplied with water from the reservoir.

For information on Rocklands Reservoir camping restrictions please visit https://www.ffm.vic.gov.au/media-releases/park-and-forest-closures

General Information

Water based recreation activities are popular.
This reservoir has six special location bouys installed adjacent to each of the six main camp grounds. These assist lake users locate their position on the lake.
Toilet facilities are available. Dogs are not permitted.

Recreational Activities

Swimming, water skiing and jet skiing is permitted at Rocklands Reservoir.
Seasonal duck hunting permitted.

Current Operating Status

Current Level 190.260 m AHD
Current Volume 98,650 ML
Percent Full 33%
Current Inflows 348 ML/week
Current Airspace 197,350 ML
33%

Comments

The maximum operating level of Rocklands Reservoir has been increased to 296,000 ML to align with the current Storage Management Rules. The maximum operating level was increased from 75% to 85% of full supply level as recommended by  the Bulk and Environmental Entitlements Operation Review. 24 September 2014.
  • Levels have risen since last report.
  • Inflows to the reservoir have increased since last report.
  • The reservoir is not currently spilling.

Information

Full Supply Level 195.47 m AHD
Full Supply Volume 348,310 ML
Maximum Operating Level (MOL) 194.67 m AHD
Maximum Operating Volume 296,000 ML
Spillway Length 154.53 m
Spillway Capacity 66,000 ML/day
Outlet Capacity 280 to 600 ML/day
Catchment Area 1,355 km2
Surface Area When Full 67.5 km2
Major Tributary Glenelg River
Average Annual Inflow 83,000 ML/year
Maximum Depth 17 m
Shoreline at full supply level 156 km
Year Constructed 1953
AHD = Australian Height Datum, expressed in metres above mean sea level
ML = Megalitres